Android分组子级的不同视图布局之BUG奇遇记
最近在使用按日期分类列表，二级条目可能不一样，于是就想到了ExpandableListView。
ExpandableListView的布局显示分割线问题：
<ExpandableListView
android:id="@+id/expandableListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:childDivider="#ededed"
android:divider="#ededed"
android:dividerHeight="10dp"
android:listSelector="@color/transparent" />
-
childDivider：二级条目的分割线 （可以是drawable或color）
-
divider：父级条目的分割线 （可以是drawable或color）
-
dividerHeight：分割线的高度
适配器的BaseExpandableListAdapter中需要注意的getChildType()类型需要从0~getChildTypeCount()-1;同理getGroupType要求也一样。看源码：
/**
* Get the type of child View that will be created by
* {@link android.widget.ExpandableListAdapter#getChildView(int, int, boolean, View, ViewGroup)}
* for the specified child item.
*
* @param groupPosition the position of the group that the child resides in
* @param childPosition the position of the child with respect to other children in the group
* @return An integer representing the type of child View. Two child views should share the same
* type if one can be converted to the other in
* {@link android.widget.ExpandableListAdapter#getChildView(int, int, boolean, View, ViewGroup)}
* Note: Integers must be in the range 0 to {@link #getChildTypeCount} - 1.
* {@link android.widget.Adapter#IGNORE_ITEM_VIEW_TYPE} can also be returned.
* @see android.widget.Adapter#IGNORE_ITEM_VIEW_TYPE
* @see #getChildTypeCount()
*/
int getChildType(int groupPosition, int childPosition);